Thanks for reporting the 404 error on the download page link. The Ext.NET Mobile 4.2.0 has not yet been released. We are working on it right now. It has a significant amount of changes and new added components (pretty much components replicating the classic toolkit ones) and it should still take some time to be ready.

Sorry for not posting a follow-up here earlier! We solved the download link problem the same day, but as of the release, no, there's no certain dates and, giving one now may be troublesome as some things may change as we are making them.

There were several new components added and it will take some time to build and test them all. But it is going to happen soon, we're actively working on it to release as soon as possible!